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11. AC Characteristics
1. All voltages referenced to VSS.
2. Tests for AC timing, IDD, and electrical, AC and DC characteristics, may be conducted
at nominal reference/supply voltage levels, but the related specifications and device
operation are guaranteed for the full voltage range specified.
3. Outputs measured with equivalent load. Refer to the AC Output Load Circuit below.
4. AC timing and IDD tests may use a VIL to VIH swing of up to 1.5V in the test
environment, but input timing is still referenced to VREF (or to the crossing point for CK,
CK), and parameter specifications are guaranteed for the specified AC input levels
under normal use conditions. The minimum slew rate for the input signals is 1V/ns in the
range between VIL(AC) and VIH(AC).
5. The AC and DC input level specifications are as defined in the SSTL_2 Standard (i.e.
the receiver effectively switches as a result of the signal crossing the AC input level, and
remains in that state as long as the signal does not ring back above (below) the DC
input low (high) level.
AC Output Load Circuit Diagrams
CONFIDENTIAL – DO NOT COPY
Page 7-43
File No. SG-0212
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